What powerful item allows Hades to "become darkness," to melt into shadows and pass through walls?

What is the terrible creature that Percy meets on The Gateway Arch?

What is the name of the fat lady, the mother of monsters?

In St. Louis, which river does Percy jump into?

In Denver, a god buys them cheeseburgers. Which god?

Name Are's girlfriend, the woman he took to the Waterland park.

Name the jealous husband of Are's lover.

What does Ares ask Percy to retrieve from the water park?

List the animals that travel in the Kindness International truck.

Who was blamed for Thalia's death?

How many days are lost at the Lotus Hotel and Casino?

How do Percy, Grover and Annabeth travel from Las Vegas to Los Angeles?

Whom does Percy meet under the sea, off Santa Monica Blvd?

What is Crusty's real name?

Name the security guard at DOA Recording Studios.

What river must be crossed to read the Underworld?

Name the three headed dog that guards Hades' door.

What is the only happy place in the Underworld?

What magic word controls the flying shoes?

Which historical figures come to mind when Percy first meets Hades?

Late in the book, Percy learns the lightening bolt was not the only thing stolen. What else was stolen?

When Percy enters the Underworld, what is in his backpack?

What does Hades offer Percy in return for his helmet?